If the print service stops in the middle of a print job
or does not start any new print jobs, determine if the
/usr/lib/lpsched daemon is running.
To do this, in the
Printer Manager
select Print Services from the System menu.
The lpsched daemon is started automatically by a
script in the /etc/rc2.d directory at system startup.

If the scheduler is down,
Local print service enabled is deselected.
To start the lpsched daemon,
select Local print service enabled.